518402985 has 16 divisors (see below), whose sum is σ = 858047040. Its totient is φ = 266947520.

The previous prime is 518402959. The next prime is 518402993. The reversal of 518402985 is 589204815.

It is a happy number.

It is not a de Polignac number, because 518402985 - 2⁵ = 518402953 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595431 + ... + 596300.

It is an arithmetic number, because the mean of its divisors is an integer number (53627940).

Almost surely, 2^518402985 is an apocalyptic number.

It is an amenable number.

518402985 is a deficient number, since it is larger than the sum of its proper divisors (339644055).

518402985 is a wasteful number, since it uses less digits than its factorization.

518402985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191768.

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 518402985 is about 22768.4647044986. The cubic root of 518402985 is about 803.3210819609.

The spelling of 518402985 in words is "five hundred eighteen million, four hundred two thousand, nine hundred eighty-five".